If an e-prescription system could have picked it up, presumably, 250mg – 1000x the intended dose – might have flagged up a few alarms with the person administering the medicine, providing of course, they were working in an organisation where it was OK to ask.

If they were not, an e-prescription system might exacerbate underlying problems, reducing opportunities to think, exercise professional knowledge and so forth.

We all know about the computer never being wrong or in which it is difficult to change erroneous data (change control procedures probably requiring a meeting of three departments, in four weeks time, if you are lucky…)

All you say is true. But what if the e-prescription system alarm had been in essence a back-up, to guard against human error – like a stick shaker on an aircraft which does nothing to fly the plane but is a last-resort warning the plane is about to enter a potentially fatal stall.